Herbert's Wormhole: The Rise and Fall of el Solo Libre is the sequel to Herbert's Wormhole, a book about three kids named Alex, Herbert, and Sammi, who create a wormhole in a playground slide that sends them into the future. While there, they don't save the planet from an alien named GOR-DON, but Alex thinks they did because he loses that memory and a video game called AlienSlayer 3D gets fused in its place. In this installment, Alex, thinking that he saved the planet once and can do it again, gets some even meaner aliens to try to destroy Earth. With nobody that knows how to save the world, will Earth survive? This was a really good book and I would recommend it to anyone who likes comedy or sci-fi.